For children, two doses of MMR vaccine are needed for full protection. The first dose should be given at 12 through 15 months of age and the second dose at 4 through 6 years of age.

Adults born during or after 1957 who received killed measles vaccine or measles vaccine of unknown type, or who cannot document having been vaccinated with a live vaccine or having laboratory-confirmed measles disease should receive at least 1 dose of MMR. Some people at increased risk of exposure to measles (such as healthcare professionals, college students, and international travelers) should receive 2 doses of MMR separated by at least 4 weeks.

Adults born before 1957 are considered immune and do not need a vaccine.

International travelers: Infants 6 through 11 months of age should receive one dose of MMR vaccine. Infants who get one dose of MMR vaccine before their first birthday should get two more doses (one dose at 12 through 15 months of age and another dose separated by at least 28 days). Children 12 months of age and older should receive two doses of MMR vaccine, separated by at least 28 days. Teenagers and adults who do not have evidence of immunity against measles should get two doses of MMR vaccine separated by at least 28 days.

For a dose to be considered valid, the patient needs some type of document that provides the date the vaccine was given and the type of vaccine administered. If someone has no documentation, they can/should receive an MMR now.